From: Herbert Xu <herbert@gondor.apana.org.au>
To: "Marek Behún" <kabel@kernel.org>
Cc: linux-crypto@vger.kernel.org,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Subject: Re: Is akcipher ready for userspace?
Date: Fri, 10 May 2024 21:25:22 +0800 [thread overview]
Message-ID: <Zj4gQlfullfvK3q8@gondor.apana.org.au> (raw)
In-Reply-To: <20240510151434.739fd5c5@dellmb>
On Fri, May 10, 2024 at 03:14:34PM +0200, Marek Behún wrote:
> Hello Herbert,
>
> back in 2019 you wrote that akcipher is still in a state of flux and
> not ready to be exposed to userspace via AF_ALG [1].
>
> Has this changed since then?
>
> I am asking because I am implementing another driver [2] for a device
> which allows for signing messages with an ECDSA private key securely
> stored inside the device, and Greg asks again [3] for this to be
> exposed to userspace via a dedicated kernel API, instead of
> debugfs.
>
> Back in 2019 when we needed this for the turris-mox-rwtm driver, I
> implemented it via debugfs because akcipher was not ready.
No I don't think akcipher is quite ready yet, given that the
recent change to kernel pointers from SG lists is still
incomplete.
However, akcipher algorithms are already partially exposed to
user-space through the keyring subsystem.
Cheers,
--
Email: Herbert Xu <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
prev parent reply other threads:[~2024-05-10 13:25 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-10 13:14 Is akcipher ready for userspace? Marek Behún
2024-05-10 13:25 ` Herbert Xu [this message]
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